Hope to run with you guys some day.

Since this turned into a bit of a boat thread vs an engine thread - more specifically a 27-29 ft boat thread - I have a 27ft boat myself......

Uncle Dave

We rebuilt a 272 a few years ago for a customer. Whippled 383's making 550 HP, Bravo drives and hydraulic steering. It ran low 80's with ease in the summer heat.

Bob Lloyd
Full Throttle Marine

That's a nice boat Dave.

That much nicer than my bottom feeder boat, I love it Uncle Dave. Here is my 27-4=23 footer (or 27-5=22 depending on which measurement :) ).

http://i1268.photobucket.com/albums/...ps95144561.jpg
http://i1268.photobucket.com/albums/...psfc25a60b.jpg
http://i1268.photobucket.com/albums/...ps9c1306f4.jpg
http://i1268.photobucket.com/albums/...ps31d2f248.jpg
http://i1268.photobucket.com/albums/...ps14ca0aae.jpg

Props
 

ya i think that i need to get some 28p and i will be right where i wanna be and i will get 82 83 poss.. I have 272 that diago linked to u guys. The 25s miarge plus that i have on it now with the 500hps still pop the boat up and go and run me 80, with wife n i in boat and light load..... 77-78mph loaded but i def wanna try some 28p props and c what happens.

props
 

ya i think that i need to get some 28p

Thats all I could get out of her @ 5600 with 23 3 blades, The 272's have a bad hook in them to help them get up with small power (350 mag ) . Ours with 350 mag power would only run 54 on GPS. With the 383's 69.7 on GPS all day top 71 best day thats picking up 14 mph from the 350 mag's. Mopower put 540's with 625hp and got it up to the low 80's. The drives are deep on these boats but they ride good. Do a search 272 thread lots of info in it !!!!!

my 272
 

1989 272 sr1

Thats a pretty big jump in prop. What RPM do you turn with the 25's?

Thanks for the likes guys.

I havent met many boats I dont like, and Id like to spend a day in any of the boats in this thread.

I was meeting a group of guys with similar boats and one guy says- I wonder where all the poor people are today? - another guy in our group answers - they are all right here!


69 Miles an hour in the ocean is hauling A. Once you get past 55-60 MPH the crowd thins out at 70 it thins out a lot.


UD

That's for sure, the old Lib runs pretty good, and while it's been humbled a LOT by faster boats, once Bob (marine kinetics) helped me piece together this "budget 502" now I feel like I can at least have some fun, and do some (that's a very limited some) of the humbling myself ;) Now if I only had a hull to go with the power it had, I'd be in luck...Any donations of 260 velocity are being accepted now.

With all the horsepower on this site, it's easy to get lost about what a fast boat is.

I will say I have yet to lose to a boat with an aft cabin, though now that I've said it, it's surely coming. Gotta watch out for those pesky Sea-Rays
:lolhit:

By the way, let's make it official. :hijack:

There is a 26 Velocity down the road from me for sale with or with out power !!!!

1998 $20,000 neg with power $ 12,000 without on a trailer, drive and Hyd steering !!!

Uncle Dave,

you have a beautiful boat !!! what is the top speed ?

69 Miles an hour in the ocean is hauling A. Once you get past 55-60 MPH the crowd thins out at 70 it thins out a lot.

Well said...and true enough...except here in SE Florida. It's a bit deflating to have your well built, well tuned rig tearing it up off shore running 70~75 and have Mister Top Gun come breezing by at part throttle making 80 with 4 aboard...lifting their mugs to you as they zip on by.

There are a lot of VERY FAST BOATS down here!!!:evilb:

Gary,

thank you for giving us your opinion !!

Thanks for your input. I really appreciate it.

Thanks.

The mill is an Ilmor 710.

It's top speed ranges from 85 in the Arizona heat, and lakes like lake mead with 4 people and 50 gallons of gas. Too a high of 90 with a couple guys and 35-40 gallons at sea level on a cold high 40's day.

It'll spin a 4 blade 28 5900 - 6K.

It isnt really built for speed but more of a luxury cruiser its loaded up with every bell and whistle- a big old escalade on the water.

Boats called a 2750 and its 28.4 feet long with the step (hence a true 27ft boat. Its made from a little company here in Southern california thats been in business since 52 called Laveycraft.

This hull has a stellar race heritage and was the first SVL to hit 90 with a 525 in it.

Beam is 8'6 mine weighs 5350 loaded as you see it with 10 gallons in its 100 gallon tank. 24 degree V.

This one is balsa cored, vacuum bagged, and fully interlined.

Lots of fun fun on Ocean trips to San Diego from Marina Del Rey and an absolute blast on a big lake.

Uncle Dave

I totally get what you mean by deflating- there is always the faster guy regardless of what you spend.

I have that problem on big lakes and calm water with all my buddies that have 100MPH cats, I stopped trying to be the fastest guy decades ago..out here you run across 100MPH boats with regularity.

Where my setup excels is in navigation under -0- visibility through busy shipping areas and in nighttime navigation. With radar and AIS sync'd to my GPS.

I can run hard where almost everyone else is blind I have perfect awareness, I can get a boatful of us from the casino at the hacienda back to temple bar marina at night without even raising my blood pressure, or come back from Catalina at night like captain Kirk navigating an asteroid field.

UD

You overestimate my budget. I have 14k in the boat, the aluminum trailer, engine build, new vinyl, and a year of gas and storage. I know, I'm a cheap-a$$. Take a Zero away and I'm on it!!!

Props
 

5200 rpm now

Sorry guys i effed up i am running 27 mirage plus @ 5200 with 500hps 80mph my speed did not change from 25p to 27p and i still jump right out of the hole with 27p. i need to get to the 28p 4 blades i belive to be where i want to... what do u think? Forgot that i traded props with another guy here at the end of season.. HAHA
I may repower neways to make 600hp each... OR whipple them..

Sounds like you are dialed in...don't mess with it uness you are just experimenting with it. Is you drive ratio 1.5? What is your RPM at 55~60?

So it sounds like 1000 HP does the deal to get 80 with BBC's. Has anyone done it with NA SBC's? I'm still thinking 850~900 does it with SBC's simply by virtue of the weight savings.

More empirical research required!!:evilb::evilb:

Id try to borrow a set before I invested.

The 4 blades will bite the water much harder than the 3's and the effect can be dramatic.

At 80 MPH I hope you have some sort of external steering.

Uncle Dave

Yeah that's pretty much perfect for RPM, maybe a labbed set of 28's to keep your rpm the same.

Diego,

You're killin me man- show us some numbers....


Uncle Dave

Fixx
 

the props you want to try next is a 25 p merc revolution,,,fast as the mirage + but carries the boat better..

I'm with you uncle Dave. I wanna see his numbers.

I am going by the shop today at noon to see what is the delay,I want to see numbers as well, we have been waiting so long,right?

Exactly!! Lol. Hope your enjoying the formula. Mine is in pieces with interior and dashes being redone

I would do everything in my power to be there when and while they dyno them.

You will learn a ton in a short time and get a firsthand look at the process.

It's worth it.

UD

+ 1

Went by today and he promised me he is bringing them Monday to Mesa Balancing to prep for Dyno.:evilb:

Oh yeah, took it out today with 4 other friends with a pretty much full tank and it was great, did not go WOT but revved it up to 4000 rpms and was doing 50 mph gps, is this about right? Love the boat !!!!:evilb:

Sounds about right. I have a smallblock boat so I avg 58 wot on GPS. 1/2 tank 4 people. They are definitely nice Ridin boats.

At what rpm ?

46-4700

To get the juices flowing....

http://www.youtube.com/watch?v=yYK78...feature=relmfu


prop testing and oil temp testing - skip to 1:20 & 3:20

http://www.youtube.com/watch?v=xfbNkf2FPk0

I've been putting big blocks "on the trailer" with this wicked little small block boat for 2 decades - they can make the beans if you do it right.

Uncle Dave

What are the specs on that 500 hp 520 tq small block?

What kind of prop are you running?